Electric connector.



J. BERG.

ELECTRIC CONNECTOR.

APPucATlon FILED Dnc. 4. me.

1,249,71 l; Emma me. 11,1917.

lll ft .l l.

JOI-IN BERG, OF CHICAGO, ILLINOIS, ASSIGNOR TO IVIETAL SPECIALTIESMANUFAC- V'IIIRIINI'G COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 0FILLINOIS.

ELECTRIC CONNECTOR.

tatami.

i Specifcationrof' Letters-Patent.

ratentea nee. il, reir.

Application filed December 4, 1916. Serial No. 134,982.

To all whom t may concern:

device7 such as an electric lamp, orV other electric device. 'Iheprimary object of the invention 1s to provide an electric connector ofimprovedl and silnplied construction. The invention is illustrated inits preferred embodiment in the accompanying drawings, in which- Figure1 represents a plan view of a socketequipped connector constructed inaccordance with my invention; Fig. 2, an end elevational view of thesame; Fig. 8, a longitudinal sectional view taken as indicated at line 3of Fig. V2; Fig. 4, a transverse sectional view taken as indicated atline 4 of Fig. l; Fig. 5, an enlarged longitudinal sectional view of oneof the terminals shown in the preceding figures; Fig. 6, a plan view ofa connector plug constructed in accordance with the invention; Fig. 7,an end elevational view of the same; and Fig. 8, an enlarged sectionalview of one of the terminals shown in' Figs. 6 and 7.

In the construction illustrated, A represents a socket-equippedconnector element;

and B represents a companion connector ele. ment adapted to be enteredin the soclret of the element A. l y

lIhe connector element A comprises a plug l of insulating material;terminals 2 ertending through the plug l, and a socketshell 3 in whichthe terminal end of the plug l is entered and secured. Eachof theterminals 2 comprises a relatively large elongated outer shell 4; arelatively small elongated inner shell 5. tted within the shell 4 at anintermediate point; a plunger-form contactmember 6 telescopicallymovable within one end of the shell 4; and a coil-spring 7 confinedbetween the xedly secured 4inner shell 5 and the movable contact-member6.

rlFhe outer shell 4 may be drawn from a metal disk into the form ot anelongated cup, the central portion of the bottom ot the cup then beingpunched out to form an openingl through which the plunger-formcontact-member may protrude; or, if `desired,` the shell 4 may comprisea seamless tubehaving-one end spun inwardly to form a flange 8.

',Ihe small inner shell 5 may be drawn conveniently from a metal diskwhich is stampedinto elongated cup form. The bot-l tom of the cup `formsa seat or bearing for one end of the spring 7. rll`he member 5 is forcedinto the open end of the tubular memi ber 4 with a snug tit, and theopen end ot the `member 5 is disposed a short distance inside of theopen end of the member 4. Thus the bore of the member 5 is adapted toreceive the naked wire` portion of a conductor `8, while the insulationof the conductor is accommodated within the open end ot` the larger tube4. One wall of the shells 4 and 5 is provided with a threaded perfowration 9. 'Ihe `tapped perforations` 9" are adapted to receive screws l0which are inserted through lateral openings 1I with which the insulationplug l is provided.,

The screws 10 serve to secure the conductors in the socket-members 5 andat the same time firmly unite the socket-members 5 to the relativelylarge shells 4.

The yieldingly-held contact-members ti are preferably elongatedcup-shaped members'stamped or drawn from metal disks. rlFhe members 6have enlarged' baseportions 6u` which ht freely within the tubularmembers 4 and engage the inturned Hanges 8 when the members areprojected as shown in-Fig. 5. y Y l The socletfshell 3 is providedwithbayf onet lslots l2 in the usualmanner.

The connector element B comprises a plug la `of insulating material; andmetal terminals 2a extending through the plug la. Fach metal terminal 2acomprises arelatively large elongated outer shell 4a and a rela tivelysmall elongated inner shell 5 which is fitted within or iixedly securedin the shell 4a atan intermediate point. rIhemembers 4u and 5iL arepreferably drawn into elongated cup-form from metal disks. 'Ihus thebottom of the cup which forms the mem-I ber 4a comprises a contact end6a; and the member 5a affords a conductor socket adapted to receive theba red wire oiE the conductor 8, while the insulation oi.E the conductoris accommodated by the open end ot theen ternal shell ta. The shells 4aand 5a are pierced by a threaded or tapped perforation 9a. Theconductors are secured in the conductor sockets 5a by means of screwsl0a which are entered through lateral openings l1a with which theinsulation plug la is provided. The plug la is fitted with a transversestud 13 adapted to engage the bayonet slots l2 of the socket-shell 3.

The connector elements A and B are united in the usual way, in makingthe connection, by entering the plug la in the socket 3 and causing thestud 13 to interlockingly engage the bayonet slots of the shell 3.

The construction described is simple, cheap and durable. The terminalsmay be produced very cheaply, inasmuch as all screw machine work is-dispensed with.

The foregoing detailed description has been given for clearness ofunderstanding only, and no unnecessary limitation should be understoodtherefrom, but the appended claims should be construed as broadly as ispermissible in vieW of the prior art.

1What I claim as new and desire to secure by Letters Patent is 1. In anelectric connector, a plug of insulating material, a terminal in saidplug comprising an elongated metal shell having an open end and providedat the opposite end with a contactsmember, a smaller elongated shelltitted therein and having an open end spaced a distance from the openend of said irst-named shell, an electric conductor received by saidsmaller shell, the opening of the larger shell being adapted toaccommodate the insulation of said conductor, and a screw extendingthrough a wall of said shells and engaging said con.- ductor. A

2. In an electric connector, a plug ot insulating material, a pair ofterminals in said plug, each comprising a pair of elongated shells oneof which is fixedly secured within the other at an intermediate point, aplunger-form contact-member slidable in one end of the larger shell, aspring confined between said ixedly secured inner shell and saidcontact-member, a conductor having a barcd extremity entered in theinner shell, the open end of the outer shell accommodating theinsulation of' said conductor, screws entered through lateral openingsin said plug and passing through said shells and engaging saidconductors, and a socket-shell fitted on said plug and housing thecontact-ineinbers of said terminals.

JOHN BERG.

